Anti-oxidation device for distributor point



April 4, 1961 YOSHIO KlNOSHlTA 2,978,551

ANTIOXIDATION DEVICE FOR DISTRIBUTOR POINT Filed March 16, 1959 2 Sheets-Sheet 1 [N VEN TUE {ya/#0 mas/#271 ATTUHNET April 1961 YOSHIO KINOSHITA 2,978,551

ANTI-0XIDATION DEVICE FOR DISTRIBUTOR POINT 1959 2 Sheets-Sheet 2 Filed March 16,

United States Patent O 2,978,551 ANTI-OXIDATION DEVICE FOR DISTRIBUTOR POINT Yoshio Kinoshita, 4 Kawashima-cho, Nakano-ku, Tokyo, Japan Filed Mar. 16, 1959, Ser. No. 799,751

3 Claims. (Cl. 200-30) Pr, Ir are used as materialsfor connection points of the distributor. However, it needs rubbing of the contact point and checking of the point clearance every 2,000 I mile run.

It has now been discovered the anti-oxidation device for 'distributor point enabling to eliminate the abovementioned deficiency.

An object of the invention is to provide a distributor pointwherein interruption of the contact points are performed in a diluted oil so that said distributor point stands acontinuous use of a long time without checking.

-A 1i ther object of the invention is to provide a dis tributor point provided with a vacuum chamber communi eating with the suction pipe, interruption of the contact points is performed inside said chamber thereby the distributor point can stand continuous use of a long time Without checking and is much more durable than the one heretofore in use even when it is made of base metal materials.

Other objects and advantages of the invention will appear from the following description of the invention.

For the purpose of illustrating the invention, there are shown in the accompanying drawings a form thereof which is at present preferred, although it will be understood that the instrumentalities of which the invention consists may be variously arranged and organized and that the invention is not limited to specific arrangement and organization of the instrumentalities as herein shown and described.

In drawing:

Fig. 1 is a truncated longitudinal section-view in an application mode of this invention;

Fig. 2: a truncated cross section-view of the above;

Fig. 3: a plan of the oil pool cap;

Fig. 4: a truncated longitudinal section-view in another application mode of this invention;

Fig. 5 a truncated cross section-view of the above.

Referring to the drawings for more specific details of the invention, 1 is the distributor body, 2: a closed oil pool fitted with free angular advance to said distributor body, 3: the oil pool cap, 4: an oil seal fitted into the inner side of said cap, the end of the distributor point arm 5 is curved and pendent in L-shape and secured with the contact point 6, 7: the earth contact point making and breaking the contact point 6, 8: the cam pivoted to the shaft 9, 10: the cam-bearing, 11: an oil pool holder sliding on the bottom of the oil pool 2 to make the 18: the octane selector, 20:

' 6 and 7 are operated in said oil.

latter do free angular advance, 12: the driving gear of the distributor, 13: the angular advance governor, 14: a rotor, 15: the distributor cap, 16: the terminal connected to the ignition coil, 17: contact arm pivot, 18: the octane selector, 19: the lubrication cap, 20: the adjusting screw of the point clearance, 21: the controlling fiber interlocking with the contact arm. Oil is put into the closed oil pool by pulling ofl? the lubricating plug 19 provided to the oil pool cap. The contact point 6 secured to the L- shaped pendent part of top of the distributor point arm 5 and the earth contact point 7 are made to be soaked into the oil so that make and break of the contact points Oil used for this purpose should be of very small viscosity like silicon oil, etc. According to this invention, as it controls sparks produced between the contact points while the distributor is in operation, provided the oil of small viscosity is selected, it eliminates trouble due to oscillation of the contact point 6, and when the contact points 6 and 7 come in contact with each other, since oil does not become the contact resistance disturbing the conductance between said 6 and 7, a smooth make and break can be operated. Hence, there is no danger of a high oxidation or consumption on the surface of the contact points so that it can insure supply of the intermittent current necessary for the primary ignition coil for a long period. Moreover, it is desirable that owing to the oil seal packing inserted into the oil pool cap 3, oil is prevented from going up to and penetrating into the high voltage section on the upper part of the oil pool and that the cam-bearing is inserted on both the upper and lower parts of the camshaft 9 to prevent rolling of the cam-shaft.

In another application mode shown in Fig. 4 and the following, 1 is the distributor body, 22: an airtight chamber is fitted in said distributor body and capable of doing free angular advance, 23: a cap of the airtight chamber 22, 5: the distributor point arm, 6': the contact point secured on top of said distributor point arm, 7': the earth contact point intermittently contacting with 6', 8': the cam pivoted to the shaft 9, 10': the cam-bearing, 11: the holder sliding on bottom of the airtight chamber to give to the latter free angular advance, 12': the driving gear of the distributor, 13': the angular advance governor, 14': the rotor, 15': the distributor cap, 16': the terminal connected to the ignition coil, 17: the contact arm pivot, the adjust screw of the point clearance, 21: the controlling fiber of the distributor point arm, 24: a pipe-like angular advance operating arm having a hollow part 25, 26: the angular advance driving lever, 27: the hose connecting the suction pipe of the engine with the angular advance operating arm, 28: the condenser. Since the suction pipe of the engine is communicated with the pipe-like angular advance operating arm 24 having a hollow part 25 by means of a rubber or metal hose 27, the airtight chamber 22 can obtain vacuum of around 18 in. mercury by the exhaust action of the engine rotation. Since make and break of the contact points is operated inside the airtight chamber in vacuum state, consumption of the contact points due to sparks is alleviated and their durability increased. Moreover, the device of this invention needs not be equipped with a special exhaust device, but only a suction pipe to the engine, hence, expenses for this equipment are very small.

The present invention may be embodied in other specific forms without departing from the spirit thereof. It is therefore desired that the present embodiments be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to foregoing description to indicate the scope of the invention.

What is claimed is:

1. In a distributor, a closed circular chamber adapted to move about an axis; an arm therefrom pivotally mounted permitting free angular movement of said chamber; a distributor arm pivotally mounted in said chamber; a distributor point on said arm; a make and break contact tip affixed to said chamber periodically engaging said distributor point at about right angles thereto according to the to and fro angular movement of said arm; an angular advance driving lever adapted to partially rotate said chamber; and an angular advance governor associated with said lever and said chamber, adjustable to limit the amount of the partial rotation of said chamber.

2. A device as claimed in *claim 1, said chamber being completely sealed and having oil therein.

3. A device as claimed in claim 1, said chamber being a vacuum chamber, said operating arm being hollow and communicating into said chamber, and exhaust means communicating with said hollow operating arm to exhaust said chamber.

References Cited in the file of this patent UNITED STATES PATENTS 

